we're expecting charges to be filed soon against suspect against dzhokhar tsarnaev. an exclusive against tamerlan. a source in russia tells nbc news russian intelligence reached out to the fbi last november about the 26-year-old. and crime scene units are back at the bomb site in boston right now. they're placing debris into garbage trucks. crews were seen sifting last night throughout that debris. let's go to pete williams. with a good afternoon to you, pete, let's talk first about the status of the charges in this case and what the likely charges will be. >> yes, i think the odds are pretty good that we'll see these charges in the next couple of hours. they're putting the final touches on them now. and we expect to learn a little more about what the fbi has assembled based on its investigation of the bombing. so perhaps there will be some new details that we'll get. in terms of the charges, i would think at the very least they'll charge him with the bombing, with a terrorism offense for that. and interestingly enough, under the federal statutes, which apply here, u